I recently bought a 2009 Starcraft pup and it has trailer brakes. I tow with a 4 door Jeep Wrangler and I installed the Mopar 7 pin wire harness. All of the lights on the camper work when plugged into the Jeep. Today, I installed the Prodigy P3 brake controller and it says no trailer connected. The blue wire on the controller is connected to the blue wire on the Mopar wire harness. I looked at the trailer wire harness connection and there is no corrosion. I have the controller connected to the brake wire at the pedal and I get a reading on the P3 when I depress the brake pedal. Anyone have any suggestions as to what the problem is?